Chinese

		to renege	abandon; relinquish; to discard abandon; relinquish; to discard; to throw away	justice; righteousness; meaning
trad. (背信棄義)		背信	棄	義
simp. (背信弃义)		背信	弃	义

Idiom

背信棄義

1. to break the faith and disregard righteousness; to act perfidiously; perfidious, treacherous; treachery, perfidy